Rock drill



Nov. 27; 1928." 1,692,934

E. G. GARTIN ROCK DRILL Filed July 2. 1921 Patented Nov. 27, 1928.

lJlTED STATES PATENT oFFicE.

ELMEB G. GAR/TIN, OF GLAREMONT, NEW HAMPSHIRE, ASDIGNOR T SULLIVAN MA- CHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

ROCK DRILL.

Application filed July 2, 1921. Serial No. 482,217.

My invention relates to rock drills and more particularly to cleansing mechanism therefor.

An object of my invention is to provide an improved cleansing mechanism for rock drilling devices. Another object of my invention is to provide an improved controlling mechanism for rock drilling devices whereby air and a liquid cleansing fluid may be advantageously controlled. Other objects and ad- V&31' i-g6S of my improved construction will be apparent during the course o1 the following specification and the appended claims.

In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

in these drawings,

Fig. 1 is a view, in elevation, of a stoping rock drill provided with my improved controlling mechanism.

Fig. 2 is a view in central section upon a plane corresponding to the line 22 of Fig. 1.

In the illustrative embodiment of my invention, which is disclosed in the accompanyi ng drawings, I have shown the same applied to a stoping drill comprising a drilling motor 1, a feeding motor 2, and controlling mechanism 3 for controlling in a well-known manner the supply of pressure to the drilling motor and to the teed cylinder thereof. The percussive motor 1 is adapted to cooperate with the hollow drill steel 4 having a bore 5 through which cleansing fluid, either liquid, or gaseous, or both, may be supplied under the control or" my improved mechanism.

As illustrated in Fig. 2, coaxially disposed tubes 6 and 7 are arrangedi'or the conduction, respectively, of air and water to the bore 5 of the drill steel, these tubes being mounted in the intermediate head 8 disposed between the motor 1 and the feed cylinder 2 and maintained in spaced relation by the member 9 which is perforated by passages 10 for the transmission from a chamber 11 of air to the outer tube 6. The water supplied is transmitted in a well-known manner from a. passage 12 through a passage 12", form-ed in a gland plug '13 threadedly connected to the head 8, and hence to the inner tube 7. F or the purpose of controlling the passage 12 and a passage 13 leading to the annular chamber 11, I have provided improved mechanism comprising an end Seating valve 1 1 for controlling the liquid cleansing fluid, and a r0- tral bore 15 which is communicable with the source of fluid supply. The valve 15 is provided in its periphery with a pair of grooves 21 and 22, the latter being connected by means of a port 16 with the central bore 15. The .groove 22 is adapted upon rotation of the valve in clockwise direction from the position shown in Fig. 2, to connect the port with i the pressure fluid supply and then to connect the port 19 with the pressure fluid supply without disconnecting the port 20 therefrom. The groove 21, as indicated, is adapted to vent the port 19 by connecting it with the passage 17. The passage 19, as indicated, communicates with a control mechanism for the water supplied, and opens into a chamber 23 which communicates with a cylinder 24, and in the latter a piston 25, provided with a leather cup-packing 26, is reciprocable un der the alternate action 01" fluid under pressure and a spring 27. The valve 14 is arranged at the end of a piston rod 28 to which the piston 25 is connected, the rod 28 being surrounded by an annular groove 29 through which water may flow into the passage 12 when the valve 14: is raised from its seat 30. As shown, the forward end of the cylinder 24 is vented to atmosphere by means of a passage 31. The piston 25 carries a washer 32 which forms a valve which is engageable with a seat 33 formed at the forward end of the cylinder 24.

The mode of operation of this device will be readily apparent. With the parts in the position shown the drill is ready to be placed in operation. Upon initial movement of the valve 15 in a clockwise direction air is supplied to the outer tube 6 and thence to the bore 5 of the tool 4 and thence to the hole. Upon further rotation of the valve 15 in a clockwise direction the air supply to the outer tube is continued while the further movement of the groove 22 will result in the connection of the port 19 likewise with fluid under pressure. When this occurs, the pressure fluid acting upon the piston 25 overcomes the pressure of the spring 27 and of the liquid upon the end of the valve 1 1 and raises the latter from its seat 30 and permits the supply of liquid by way of the passage 12 to the inner tube 7, this supply being maintained as long as the groove 22 communicates with the passage 19. It will be observed that when the water controlling valve 1 1 is open the valve 32 has engaged the seat 33, thus cutting off communication between the vent passage 31 and the cylinder M, and preventing leakage of water past the valve stem to the cylinder 24. It will be evident that still further rotation of the valve 15 will interrupt the supply of air while maintaining the supply of water. \Vhen it is desired to discontinue this operation, the valve 15 is turned in a counter-clockwise direction cutting off first the supply of pressure fluid to the port 19, then venting the latter and finally interrupting the connection between the pressure supply and the port 20. As a result of the connection between ports 19 and 18, the fluid pressure behind the piston 25 escapes and the valve 14 is seated by the combined action of its spring and the liquid acting upon an unbalanced area thereof; It will be noted that the valve 14 closes slightly before the supply of pressure fluid to the outer tube 6, by way of passage 11, is interrupted. Accord ingly, there will be a final blast of gaseous fluid through the bore 5 of the drill steel and the latter may be dried out in this manner.

While I have in this specification specifically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration, and that my invention may be modified and embodied in various other forms Without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is 1. In a rock drilling mechanism, means for conducting cleansing fluid to a drilled hole including a plurality'of tubes, means for supplying cleansing fluids thereto comprising a plurality of separate conduits leading to said tubes, and means for controlling the flow of fluid through said tubes comprising a plurality of valves, and controlling means for said valves operable to permit flow past one of the same while the other is closed and including pressure controlled means for controlling one of said valves wholly controlled by another thereof.

2. In a rock drilling mechanism, means for conducting cleansing fluid to a drilled hole including a plurality of tubes, means for supplying cleansing fluids thereto including a plurality of separate conduits leading to said tubes, and means for controlling the flow of fluid through said tubes including a plurality of valves, and controlling means for said valves including pressure controlled means for controlling one of said valves Wholly controlled by another thereof, said latter valve being adapted to supply fluid to one of said tubes while the other valve is closer.

3. In a rock drilling mechanism, means for conducting cleansing fluid to a drilled hole, means for supplying a plurality of cleansing fluids thereto comprising a plu rality of conduits leading thereto, and means for controlling said conduits comprising a valve in each of said conduits, pressure fluid operating means for one of said valves, 1nanual operating means for another thereof, and means whereby operation of manual control means may effect separate operation of said valves or maintain both in open position at the same time.

4:. In a rock drilling mechanism, dust allaying means'comprising air and liquid conducting tubes, a control valve for the supply of liquid through said liquid conducting tube, a fluid pressure controlled piston for moving said valve in one direction, automatic means for effecting its return when said piston is not subjected to fluid pressure, and controlling means for said piston comprising a valve controlling the supply and exhaust of actuating fluid to and from the same, said latter valve also being adapted to control the supply of air to said air conducting tube.

5. In a rock drilling mechanism, means for conducting cleansing fluid to a drilled hole including a plurality of tubes, means for supplying cleansing fluids thereto including a plurality of separate conduits leading to said tubes, and means for controlling the flow of fluidthrough said tubes comprising separate valves, one of said valves being adapted to supply fluid to one of said tubes While the other valve is closed, a piston controlling one of said valves, a cylinder in which said piston is reciprocable, and means for operating said piston by pressure fluid including passage mcans leading to said cylinder and controlled by another of said valves.

6. In a rock drillin mechanism, a hole cleansing means including a plurality oi fluid conducting means, and controlling means therefor including separate controlling elements and actuating means for the latter for successively effecting closure of the conducting means and keeping the same closed, one of said actuating means comprising fluid pressure operated element operative on operator controlled fluid supply thereto to move its respective controlling element.

7. In a rock drilling mechanism, hole cleansing means including a plurality of fluid conducting means, and separate controlling means therefor including separate controlling elements having separate actuating means and under common manual control and operative to successively effect closure of said conducting means and maintenance of said conducting means closed, one of said actuating means comprising a manually controlled fluid pressure actuated element operative on operator controlled fluid supply thereto to move its respective controlling ele ment.

8. In a rock drilling mechanism, a hollow drill steel, cleansing fluid supply means therefor including a plurality of conduits for supplying air and water to said steel, separate controlling elements for said conduits, and operating means for said controlling means including elements adapted selectively to open only one or to maintain both of said conduits simultaneously open.

9. In a rock drilling mechanism, means for conducting cleansing fluid to a drilled hole in cluding a plurality of tubes, means for supplying a plurality of cleansing fluids thereto including a plurality of separate conduits leading to said tubes, and means for controlling the flow of fluid through said tubes comprising a valve in each of said conduits, pressure fluid operating means for one of said valves, manual operating means for the other thereof, and means whereby operation of said manual control means may effect separate operation of said valves or maintain them simultaneously iii-open position.

10. In a rock drilling mechanism, dust allaying means comprising liquid and gaseous fluid conducting tubes, means for independently controlling the flow o1 fluid through said tubes including a plurality of separate valves, a fluid pressure controlled piston for moving one of said valves in one direction, automatic means for effecting movement of said piston in the opposite direction when the latter is not subjected to fluid pressure, and control means for said piston comprising said other valve for controlling the supply and exhaust of actuating fluid to and from the same.

11. In a rock drilling mechanism, a hollow drill steel, a plurality of tubes for conducting cleansing fluids thereto, separate valves for controlling the supplies of fluids to said tubes, a piston controlling one of said valves, a cylinder in which said piston is reciprocab-le, passage means leading to said cylinder controlled by the other of said valves, and means to vent said cylinder when said last mentioned valve is closed.

12. In a rock drilling mechanism, a hollow drill steel, means for conducting air and water thereto for cleansing the drill hole, separate valves for controlling the supply of air and water to said conducting means, one of said valves being adapted to open one of said supplies while the other supply is closed, an operating piston for said water control valve, a cylinder in which said piston is reciprocable, means for actuating said piston by fluid pressure including passage means leading to said cylinder controlled by said air control valve,

and means to vent said cylinder when said air control valve is closed.

18. In a rock drilling mechanism, a hollow drill steel, means for conducting cleansing fluids thereto, separate valves for controlling the supplies of fluids to said conducting means, one of said val es being adapted to open one of said supplies while the other supply is closed, an operating piston controlling one of said valves, a cylinder in which said piston is reciprocable, means for actuating said piston by fluid pressure including passage means leading to said cylinder controlled by the other of said valves, means to vent said cylinder when said last mentioned valve is closed, and means for automatically closing said piston controlled valve when said cylinder is vented.

14. In a rock drilling mechanism, a hollow drill steel, means for conducting cleans ing fluids thereto, separate valves for con trolling the supplies of fluid to said conducting 'means, one of said valves being adapted to open one of said supplies while the other supply is closed, an operating piston controlling one of said valves, a cylinder in which said piston is reciprocable, means for venting one end of said cylinder, means carried by said piston for closing communication between said vent means and said cylinder when said piston controlled valve is open, means for actuating said piston by fluid pressure including passage means leading to said cylinder controlled by the other of said valves, and means to vent the other end of said cylinder when said last mentioned valve is closed.

15. In a rock drilling mechanism, a hollow drill steel, means for conducting cleansing fluids thereto, separate valves for controlling the supplies of fluid to said conducting means, one of said valves being adapted to open one of said supplies while the other supply is closed, an operating piston controlling one of said valves, a cylinder in which saidpiston is reciprocable, means for venting one end of said cylinder, means carried by said piston for closing communica tion between said vent means and said cylinder when said piston controlled valve is open, means for actuating said piston by fluid pressure including passage means lead ing to said cylinder controlled by the other of said valves, means to vent the other end of said cylinder when said last mentioned valve is closed, and means for automatically closing said piston controlled valve when said latter vent means is open.

1 6. In a rock drilling mechanism, a hollow drill steel, means for conducting cleansing fluids thereto, separate valves for con trolling the supplies of fluid to said conducting means, one of said valves being adapted to open one of said supplies while the other supply is closed, an operating piston controlling one of said valves, a cylinder in which said piston is reciproeable, means for venting said cylinder, valve means carried by said piston for closing the communication between said vent means and said cylinder when said piston controlled valve is open, and passage means controlled by another o'f'said valves and leading to said cylinder for supplying fluid to the latter for actuating said piston.

17. In a rock drilling mechanism, a hollow drill steel, means for conducting liquid and gaseous pressure fluids thereto for cleansing the drill hole, separate valves for controlling the supply of liquid and gaseous fluid to said conducting means, one of said valves being adapted to open one of said supplies While the other supply is closed, an operating piston for one of said valves, a cylinder in Which said piston is reciprocable, passage means controlled by the other of said valves and leading to said cylinder for supplying fluid to the latter for opening said piston controlled valve, said latter valve 'openmg against the action of the fluid controlled thereby, means to vent said cylinder When said air valve is closed, and means for automatically closing said piston controlled valve when said cylinder is vented.

In testimony whereof I aflix my signature.

ELMER G. GARTIN.

CERTIFICATE OF CORRECTION. Patent No. 1,692,934. Granted November 27, 1928, to

ELMER G. GARTIN.

It is hereby eertiiied that error appears in the printed specification of the above numbered patent requiring correction as follows: Rage 3, line 13, claim 8, tor the Word "means" second occurrence read "elements", and line 14, for the Werd elements read "means"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the in the Patent Cfiicee Signed and seated this 12th day of February, A. D. 1929.

J. Moore, (Seat) v Acting Commissioner of Patents, 

